Second , the paper studies the testing project by orthogonal test and the method of principle components analysis to pick up the optimum testing condition . third , the paper analyzes the signal from vibration energy and abrasion degree 通过建立大型回转轴承装置的振动模型,以大量的试验数据为依据,提出了一套从试验条件与参数的选取到最后分析结论判定的系统方法。